The business is on the hinge: it is in that state that it must now, one way or the other, be soon terminated, alluding to a door, which, hanging on its hinges, may be shut or opened by a very slight impulse. We also say the business hinges (turns) on such a circumstance; if that be made out, it will end successfully, if not it will fail.
2.
Res indicabit
It will be shewn by the event: we shall thence learn whether what has been stated be the real truth.